Hello Sean,
If you are still interested contact me as I have an original Rabco SL-8e in the original box with all paperwork and instructions. (i had slightly trimmed the arm to decrease mass.) I put in a C battery and both the vertical and lateral servos still work fine. It will fit any turntable with a long flat mounting board. I has used it with a Thorens TD125 (I think). I think it will work fine with a MM cartridge, but you may be able to hear the servo with an MC cartridge.
If you are still interested contact me as I have an original Rabco SL-8e in the original box with all paperwork and instructions. (i had slightly trimmed the arm to decrease mass.) I put in a C battery and both the vertical and lateral servos still work fine. It will fit any turntable with a long flat mounting board. I has used it with a Thorens TD125 (I think). I think it will work fine with a MM cartridge, but you may be able to hear the servo with an MC cartridge.